Air supply system for incinerator apparatus

Abstract

Incinerator apparatus includes a furnace and a chimney in communication with the furnace. Within the furnace, a pipe having a bore and extending upward from the bottom of the furnace is disposed. The pipe is in communication with atmospheric air at the lower end thereof and is provided with a plurality of air holes therein. The pipe also includes a top air hole at the top end thereof. The top air hole has a transverse cross-sectional area smaller than that of the bore of the pipe. External air is spontaneously introduced from the outside of the furnace and flows out through the top air hole. As air flows out of the top air hole, it is also uniformly distributed through the air holes into the furnace and garbage to be burned in said furnace.

What is claimed is: 
     
       1. Incinerator apparatus comprising: a furnace having a peripheral wall and a bottom section supported horizontal with a space formed between said bottom section and a floor on which said furnace is installed, said peripheral wall and said bottom section forming a furnace chamber, said bottom section being capable of carrying thereon matters to be burnt and ash resulting from burning matters;   a chimney communicating with said furnace chamber at a location in an upper portion thereof;   an air supply hole extending through said bottom section to communicate with said space; and   an air supply pipe extending upward within said furnace chamber, with the lower end of said air supply pipe being connected to communicate with said air supply hole in said bottom section, said air supply pipe having a bore having a given transverse cross-sectional area over substantially the entire length thereof: wherein:     said air supply pipe has a plurality of air holes extending through the peripheral wall thereof, said air holes being distributed over substantially the entirety of said peripheral wall;   said bore having a reduced transverse cross-sectional area at the top end of said air supply pipe to form a top air hole, the ratio of said reduced transverse cross-sectional area of said top air hole to the area of said given transverse cross-sectional area of said bore being from about 2% to about 10%, said top air hole having a larger cross-sectional area than said air holes;   the upper portion of said furnace chamber above said top air hole in said air supply pipe including substantially no obstacles to the flow of air flowing out through said top air hole.   
     
     
       2. The incinerator apparatus according to claim 1 further comprising at least one branch pipe communicating with said air supply pipe and extending toward said peripheral wall of said furnace, said branch pipe having a plurality of air holes extending through the peripheral wall thereof so that air from said air supply pipe can flow out through said plurality of air holes into said furnace chamber. 
     
     
       3. The incinerator apparatus according to claim 1 wherein said chimney is provided with an air supply section, said air supply section comprising: an air supply chamber formed by a cylindrical wall around the chimney, air introducing openings formed in said cylindrical wall, and air supply openings formed in the part of said chimney surrounded by said air supply chamber.   
     
     
       4. The incinerator apparatus according to claim 1, further comprising: a cyclone burning and dust collecting section formed integral with said furnace with a partition wall disposed therebetween, said partition wall having a communication opening formed therein, said furnace and said cyclone burning and dust collecting section communicating with each other through said communication opening in said partition wall;   said cyclone burning and dust collecting section comprising a cyclone furnace having a cyclone chamber;   an air intake section for supplying air from outside into said cyclone chamber being disposed near said communication opening;   said chimney being mounted to said cyclone burning and dust collecting section at substantially the center of said cyclone burning and dust collecting section, with the lower end of said chimney extending into said cyclone chamber.   
     
     
       5. The incinerator apparatus according to claim 1 further comprising: at least one peripheral air supply hole extending through said bottom section in the periphery of said bottom section to communicate with said space between said bottom section and said floor; and   a peripheral air supply pipe having one end communicating with said peripheral air supply hole and extending upward in said furnace chamber, said peripheral air supply pipe having a plurality of air holes extending through the peripheral wall thereof.   
     
     
       6. The incinerator apparatus according to claim 1 wherein: at least one air path is formed to extend upward outside said peripheral wall of said furnace, said air path having an upper end communicating with the upper portion of said furnace chamber and having a lower end communicating with said space between said bottom section and said floor;   a plurality of air channels are formed through said peripheral wall of said furnace so that said furnace chamber and said air paths communicate with each other; and   said air path has its transverse cross-sectional area reduced at the top thereof to provide a top air hole.   
     
     
       7. The incinerator apparatus according to claim 6 wherein the ratio of said reduced transverse cross-sectional area of said air path to said given transverse cross-sectional area of said air path is from about 2% to about 10%.